|The critical inclination in satellite theory - Omathuna, D|
No Abstract Available
Keywords: AIRCRAFT CONTROL; SPIN; AIRCRAFT PERFORMANCE; ANGLE OF ATTACK; ATTITUDE CONTROL
|Performance of multiple jet-exit installations - Nelson, W. J.|
Internal aerodynamics and performance of clustered jet-exit installations at transonic speeds
Keywords: AERODYNAMICS; JET EXHAUST; AIRCRAFT PERFORMANCE; BOATTAILS; JET AIRCRAFT; JET EXHAUST; TRANSONIC SPEED; AERODYNAMICS; AIRCRAFT PERFORMANCE; JET AIRCRAFT
|Flight handling quality problems posed by swept-wing transport planes without tail units - Fage, E.|
Flight handling quality problems posed by swept wing, tailless transport aircraft
Keywords: AIRCRAFT PERFORMANCE; TRANSPORT AIRCRAFT; CONTROLLABILITY; SWEPT WINGS; TAILLESS AIRCRAFT; TRANSPORT AIRCRAFT; AIRCRAFT PERFORMANCE; HANDLING QUALITY; SWEPT WING; TAILLESS AIRCRAFT
|A simulator study to determine pilot opinion of the trim changes with power for deflected slipstream STOL airplanes - Drinkwater, F. J., III|
Powered trim changes affecting pilot during simulated landing for short take off and landing aircraft
Keywords: AIRCRAFT LANDING; AIRCRAFT PERFORMANCE; FLIGHT SIMULATION; PILOT PERFORMANCE; STOL AIRCRAFT; AIRCRAFT PERFORMANCE; DEFLECTION; FLIGHT SIMULATION; PILOT PERFORMANCE; SHORT TAKEOFF AIRCRAFT; SIMULATORS; SLIPSTREAMS; AIRCRAFT LANDING
|NASA Connect - SOF - Question and Answer Session - NASA LaRC Office of Education|
NASA Connect segment featuring two NASA experts in a question and answer session. The video involves people calling in and emailing questions for the experts to answer.
Keywords: NASA Connect; Expert; NASA; Scientists; Inquiry; Aircraft Performance; Wing Span; Weather; Glide Ratio
|QUESTIONNAIRE SURVEY OF APPROACH LIGHT - IWATAKI, N|
THE RESULTS OF A SURVEY ARE PRESENTED WHICH INCLUDES A QUESTIONNAIRE POLLING OF 27 PILOTS ON THE EFFICIENCY OF VARIOUS METHODS OF APPROACH LIGHTING. THE CALVERT BAR SYSTEM AND STROBE FLASH LIGHTING WERE BOTH CONSIDERED USEFUL VISUAL AIDS IN APPROACH LIGHTING AT LOW VISIBILITY, WITH STROBE FLASH LIGHTING GIVING LESS GLARE. THE PILOTS AGREED, HOWEVER, THAT ON CLEAR NIGHTS APPROACH LIGHTING COULD CAUSE A DISTURBING GLARE IN THE FINAL LANDING STAGE.
Keywords: AIRCRAFT GUIDANCE; AIRCRAFT PERFORMANCE; AIRCRAFT STABILITY; FLIGHT CONTROL; AERODYNAMIC CHARACTERISTICS; NONLINEAR SYSTEMS; NUMERICAL ANALYSIS; SYSTEMS ANALYSIS
|ALGORITHM FOR COMPUTING SATELLITE ORIENTATION. VALUES OF THE GRAVITATIONAL CONSTANTS - ELYASBERG, P. E.|
AN ALGORITHM IS PRESENTED FOR COMPUTING SATELLITE ORIENTATION ALONG WITH TABLES OF GRAVITATIONAL CONSTANTS USED IN THE COMPUTATION.
Keywords: AERODYNAMIC CHARACTERISTICS; AIRCRAFT ENGINES; FLIGHT SAFETY; MULTIENGINE VEHICLES; AIRCRAFT CONTROL; AIRCRAFT PERFORMANCE; AIRCRAFT RELIABILITY
|Estimating Bias Error Distributions - Liu, Tian-Shu|
This paper formulates the general methodology for estimating the bias error distribution of a device in a measuring domain from less accurate measurements when a minimal number of standard values (typically two values) are available. A new perspective is that the bias error distribution can be found as a solution of an intrinsic functional equation in a domain. Based on this theory, the scaling- and translation-based methods for determining the bias error distribution arc developed...
Keywords: AERONAUTICAL ENGINEERING; BIBLIOGRAPHIES; DATA BASES; INDEXES (DOCUMENTATION); AIRCRAFT ENGINES; GROUND SUPPORT EQUIPMENT; AIRCRAFT PERFORMANCE
|Hall Effect Thruster Interactions Data From the Russian Express-A2 and Express-A3 Satellites - Sitnikova, N.|
This 12-part report documents the data obtained from various sensor measurements taken aboard the Russian Express-A2 and Express-A3 spacecraft in Geosynchronous Earth Orbit (GEO). These GEO communications satellites, which were designed and built by NPO Prikladnoy Mekhaniki (NPO PM) of Zheleznogorsk, Russia, utilize Hall thruster propulsion systems for north-south and east-west stationkeeping and as of June 2002, were still operating at 80 deg E and 11 deg W, respectively...
Keywords: DRAG; AIRCRAFT PERFORMANCE; AERODYNAMICS; TURBULENT BOUNDARY LAYER; COMPRESSIBLE FLOW; SCHLIEREN PHOTOGRAPHY; MACH NUMBER; WIND TUNNELS
|Tracking and Navigational Accuracy Analysis - NON|
Transmission media effects on DSN navigational accuracy and tropospheric effects on navigation errors
Keywords: FLIGHT CONTROL; INERTIAL NAVIGATION; INERTIAL REFERENCE SYSTEMS; AERODYNAMIC CHARACTERISTICS; AIRCRAFT PERFORMANCE; AIRCRAFT STABILITY
|Horizons in the development of aircraft and conclusions - Zonshayn, S. I|
Aircraft development as function of design, thrust-weight ratio and engines
Keywords: AIRCRAFT DESIGN; AIRCRAFT ENGINES; AIRCRAFT PRODUCTION; THRUST-WEIGHT RATIO; AIRCRAFT PERFORMANCE; AIRCRAFT SPECIFICATIONS; AIRSPEED; FLIGHT CHARACTERISTICS
|Adaptive tracking for complex systems using reduced-order models - Carignan, Craig R|
Reduced-order models are considered in the context of parameter adaptive controllers for tracking workspace trajectories. A dual-arm manipulation task is used to illustrate the methodology and provide simulation results. A parameter adaptive controller is designed to track the desired position trajectory of a payload using a four-parameter model instead of a full-order, nine-parameter model. Several simulations with different payload-to-arm mass ratios are used to illustrate the capabilities of ...
Keywords: AIRCRAFT PERFORMANCE; ATMOSPHERIC MODELS; COMPUTATION; ESTIMATING; SIMPLIFICATION; TRAJECTORIES; TRAJECTORY OPTIMIZATION; EQUATIONS OF MOTION; FLIGHT ENVELOPES
|PROBLEM OF GENERALIZING EXPERIMENTAL DATA ON HEAT TRANSFER IN THE VICINITY OF THE FORWARD STAGNATION POINT OF A CYLINDER POSITIONED PERPENDICULAR TO THE FLOW - DYBAN, Y. P.|
THE INFLUENCE IS DISCUSSED OF THE REYNOLDS NUMBER AND OF THE DEGREE AND SCALE OF TURBULENCE UPON HEAT EXCHANGE AT THE FORWARD CRITICAL POINT IN TURBULENT FLOW. IT IS FOUND THAT THERE IS A GREAT SCATTER OF THE EXPERIMENTAL DATA.
Keywords: AIRSPEED; DATA ACQUISITION; MACH NUMBER; WIND TUNNEL TESTS; AIRCRAFT PERFORMANCE; FLIGHT CHARACTERISTICS; INTERNAL FLOW; RESEARCH AIRCRAFT
|Parachute subsystem (ME623-0006-0001). Increased capability program. Block 2 - NON|
No Abstract Available
Keywords: AIRCRAFT PERFORMANCE; AIRFOILS; ATLIT PROJECT; FLIGHT TESTS; LIFT DRAG RATIO; PERFORMANCE PREDICTION; PERFORMANCE TESTS; SEPARATED FLOW
|SKANE FROM AN ALTITUDE OF 900 KILOMETERS - SVENSSON, H|
ERTS-1, AN UNMANNED OBSERVATION SATELLITE AT AN ALTITUDE OF 900 KM, TAKES PICTURES OF THE EARTH'S SURFACE IN SEVERAL FREQUENCY BANDS AND RELAYS THEM TO GROUND BY TELEMETRY. COASTAL FORMATIONS ARE SEEN TO BE CLEAREST IN THE VISIBLE SPECTRAL RANGES, WHILE GROUND COVER IS DIFFERENTIATED BEST IN THE IR CHANNELS.
Keywords: AIRCRAFT PERFORMANCE; DATA ACQUISITION; FLIGHT SIMULATION; FLIGHT TESTS; CORRELATION; DATA PROCESSING; EQUIPMENT SPECIFICATIONS; SYSTEMS ANALYSIS
|Ground pattern analysis in the Great Plains - Davis, J. C.|
The author has identified the following significant results. Spatial frequency analysis of ERTS-1 images appears to be useful in discriminating between large scale ground patterns in Kansas. Using parameters derived from the optical data processing of ERTS-1 images, sample areas from large physiographic categories have been accurately identified.
Keywords: AERODYNAMIC CHARACTERISTICS; FLAPS (CONTROL SURFACES); GROUND EFFECT (AERODYNAMICS); AIRCRAFT PERFORMANCE; LIFT AUGMENTATION; WING PLANFORMS
|THE COSMONAUT AS RESEARCHER - RUKAVISHNIKOV, N. N.|
THE POSSIBILITIES WHICH HAVE OPENED UP FOR SCIENCE DUE TO EXPERIMENTS CARRIED OUT DIRECTLY IN SPACE ARE DISCUSSED, AS WELL AS RESULTS OBTAINED FROM THE FLIGHTS OF COSMONAUTS. THE COSMONAUT PROFESSION AND FLIGHT TRAINING ARE EXAMINED. FUTURE TRENDS IN THE DEVELOPMENT OF MANNED SPACE TECHNOLOGY ARE BRIEFLY INVESTIGATED.
Keywords: AERODYNAMICS; AERONAUTICAL ENGINEERING; AIRCRAFT PERFORMANCE; FLIGHT TESTS; PERFORMANCE PREDICTION; RESEARCH FACILITIES; SYSTEMS ANALYSIS
|Perfluoroalkyl polytriazines containing pendent iododifluoromethyl groups - Rosser, R. W|
New perfluoroalkyl polytriazines containing pendent iododifluoromethyl groups are prepared by the reaction of perfluoroalkyl dinitriles with ammonia to form poly(imidoylamidines), followed by the cyclization of the imidoylamidine groups with, e.g., various mixtures of a perfluoroacyl fluoride with an omega iodoperfluoroacyl fluoride. The polytriazines obtained can be cured by heat which causes crosslinking at the iododifluoromethyl groups by elimination of iodine and formation of carbon-to-carbo...
Keywords: AIRCRAFT DESIGN; AIRCRAFT PERFORMANCE; XV-15 AIRCRAFT; FLIGHT CONTROL; FLIGHT TESTS; PROPULSION SYSTEM CONFIGURATIONS
|Project Vanguard Magnetic-Field Instrumentation and Measurements - Heppner, J. P.|
The Vanguard III Satellite, 1959 Eta, placed in orbit on September 18, 1959, contained a proton precessional magnetometer for magnetic-field studies of exceptional accuracy. Throughout the 85 days of battery life, the instrumentation functioned according to plan. Measurements of the absolute total field were obtained in the meridian belts of Minitrack stations at altitudes 510 to 3750 kilometers and at latitudes /- 33.4 degrees...
Keywords: TWO DIMENSIONAL FLOW; SUPERSONIC FLOW; HEATING; THIN WINGS; PROPULSION; AIRCRAFT PERFORMANCE; PROPULSIVE EFFICIENCY; PROPULSION SYSTEM PERFORMANCE
|Effects of canard location on the aerodynamic characteristics of a sharp-nosed missile at Mach numbers of 1.5 and 2.0 - Kassner, D. L.|
A sharp-nosed missile model with nose-mounted canards and cruciform tail surfaces was tested in the Ames 6- by 6-foot wind tunnel to determine the contributions of the component aerodynamic surfaces on the static aerodynamic characteristics at Mach numbers of 1.5 and 2.0 and a Reynolds number of 1,000,000 based on body diameter. Effect of canard location (at three different axial positions) was investigaed...
Keywords: AIRCRAFT PERFORMANCE; HELICOPTERS; USER MANUALS (COMPUTER PROGRAMS); COMPUTER PROGRAMS; INPUT/OUTPUT ROUTINES; SPECIFICATIONS
|Computer Program for Calculation of a Gas Temperature Profile by Infrared Emission: Absorption Spectroscopy - Buchele, D. R|
A computer program to calculate the temperature profile of a flame or hot gas was presented in detail. Emphasis was on profiles found in jet engine or rocket engine exhaust streams containing H2O or CO2 radiating gases. The temperature profile was assumed axisymmetric with an assumed functional form controlled by two variable parameters. The parameters were calculated using measurements of gas radiation at two wavelengths in the infrared...
Keywords: AIRCRAFT LANDING; COMPUTER PROGRAMS; TAKEOFF; AIRCRAFT PERFORMANCE; AIRFRAMES; COMPUTERIZED SIMULATION; FLEXIBILITY
|Thermal-protection material evaluation and diagnostic study of advanced high-power arc jets for planetary entry simulation - Baganoff, D.|
No Abstract Available
Keywords: AERODYNAMIC CHARACTERISTICS; ARROW WINGS; LEADING EDGE SWEEP; SWEPT WINGS; AERODYNAMIC STABILITY; AIRCRAFT CONTROL; AIRCRAFT PERFORMANCE; CONTROLLABILITY
|Facilities plan - NASA Project Apollo test launch vehicle, Little Joe 2 - Edelstein, M. I|
No Abstract Available
Keywords: FLEXIBLE WINGS; FLIGHT TESTS; PARAGLIDERS; AERODYNAMIC CHARACTERISTICS; AERODYNAMIC CONFIGURATIONS; AIRCRAFT PERFORMANCE; AIRCRAFT STABILITY; FOLDING STRUCTURES
|Apparatus and procedure to detect a liquid-solid interface during crystal growth in a bridgman furnace - NON|
This invention relates to a method and apparatus for detecting a liquid-solid interface of a substance. In particular, the invention detects the liquid-solid interface of a semiconductor crystal grown in a Bridgman furnace. A substance, such as germanium, in a Bridgman furnace is irradiated by solid-penetrating energy from a radiation source. The solid penetrating energy is detected by a radiation detector...
Keywords: AIRCRAFT PERFORMANCE; AIRCRAFT STABILITY; CANARD CONFIGURATIONS; CONTROLLABILITY; FLIGHT CONTROL; AERODYNAMICS; AIRCRAFT DESIGN; DESIGN ANALYSIS
|THE MINOR PLANETS - ZIGEL, F. Y|
STUDIES OF THE ASTEROIDS AND THEIR RELATIONSHIP TO METEROIDS AND COMETS ARE DISCUSSED, AND DETAILS ARE GIVEN ON THE MORE INTERESTING ASTEROIDS. DIRECT ASTRONOMICAL OBSERVATION AND LABORATORY DATA ON METEORITES, SINGLY AND IN COMBINATION, ARE USED TO STUDY THE ASTEROIDS. THE REAL AND APPARENT MOTION AND ORBITS ARE DESCRIBED, ALONG WITH ASTEROID FAMILY IDENTIFICATION AND THE THREE-BODY PROBLEM. THE CHARACTERISTICS ARE GIVEN OF THE TROJAN GROUP, EROS, GANYMEDE AND ITS GROUP, HIDALGO, ICARUS, AND TH...
Keywords: AERODYNAMIC CHARACTERISTICS; AIRCRAFT PERFORMANCE; TU-144 AIRCRAFT; AERODYNAMIC CONFIGURATIONS; FLIGHT CONTROL; FLIGHT SAFETY
|Quantitative values of blood flow through the human forearm, hand, and finger as functions of temperature - Montgomery, L. D|
A literature search was made to obtain values of human forearm, hand and finger blood flow as functions of environmental temperature. The sources used include both government and laboratory reports and the research presented in the open literature. An attempt was made to review many of the more quantitative noninvasive determinations and to collate the results in such a way as to yield blood flow values for each body segment as continuous functions of temperature...
Keywords: AIRCRAFT CONTROL; AIRCRAFT PERFORMANCE; F-8 AIRCRAFT; FLIGHT CONTROL; AERODYNAMIC COEFFICIENTS; DATA PROCESSING; SYSTEMS ENGINEERING
|Advanced Global Atmospheric Gases Experiment (AGAGE) - Weiss, R. F|
The Advanced Global Atmospheric Gases Experiment (AGAGE) is an ongoing research project, for which the work carried out by the Scripps Institution of Oceanography. Due to the need to complete AGAGE activities specifically funded under NAGW-2034 that had been delayed, a no-cost extension to this grant was obtained, creating an overlap period between the two grants. Because the AGAGE project is continuing, and a Final Project Report is required only because of the change in grant numbers, it is mo...
Keywords: AERONAUTICAL ENGINEERING; BIBLIOGRAPHIES; AIRCRAFT DESIGN; AIRCRAFT PERFORMANCE; AIRCRAFT STRUCTURES; DATA BASES; GROUND SUPPORT EQUIPMENT; AIRCRAFT EQUIPMENT
|The impact of solar cell technology on planar solar array performance - Mills, Michael W.|
The results of a study into the potential impact of advanced solar cell technologies on the characteristics (weight, cost, area) of typical planar solar arrays designed for low, medium and geosynchronous altitude earth orbits are discussed. The study considered planar solar array substrate designs of lightweight, rigid-panel graphite epoxy and ultra-lightweight Kapton. The study proposed to answer the following questions: Do improved cell characteristics translate into array-level weight, size a...
Keywords: AIRCRAFT PERFORMANCE; DISPLAY DEVICES; ENGINE MONITORING INSTRUMENTS; JET THRUST; CIVIL AVIATION; COCKPITS; PROPULSIVE EFFICIENCY
|Thermal Theory of Combustion and Explosion - Semenov, N. N|
This paper discusses the thermal theory of combustion and explosion, and conditions of ignition: transformation accompanied by heat liberation, transformation rate and temperature dependence.
Keywords: TURBOJET ENGINES; PROPULSION SYSTEM PERFORMANCE; AIRCRAFT PERFORMANCE; TECHNOLOGY ASSESSMENT; JET AIRCRAFT; RESEARCH AND DEVELOPMENT
|Free flight investigation at transonic speeds of the power-on characteristics including some effects of sonic propulsive jets of a four engine delta wing configuration - Falanga, R. A.|
No Abstract Available
Keywords: NUCLEAR PROPELLED AIRCRAFT; NUCLEAR RAMJET ENGINES; SUPERSONIC AIRCRAFT; SYSTEMS ANALYSIS; AIRCRAFT PERFORMANCE; PERFORMANCE PREDICTION; RADIATION SHIELDING
|The first aerodynamic three-phase electric power plant in Balaklawa - Sectorov, W. R|
The assembly and functional characteristics of an experimental 100 kW power plant built in Crimea are described. The operating data obtained during the first two years of operation are reported.
Keywords: EXTERNALLY BLOWN FLAPS; LIFT AUGMENTATION; PERFORMANCE TESTS; SHORT TAKEOFF AIRCRAFT; AERODYNAMIC CHARACTERISTICS; AERODYNAMIC CONFIGURATIONS; AIRCRAFT PERFORMANCE
|Multiple Jet Study - Walker, R. E.|
Test data is presented which allows determination of jet penetration and mixing of multiple cold air jets into a ducted subsonic heated mainstream flow. Jet-to-mainstream momentum flux ratios ranged from 6 to 60. Temperature profile data is presented at various duct locations up to 24 orifice diameters downstream of the plane of jet injection. Except for two configurations, all geometries investigated had a single row of constant diameter orifices located transverse to the main flow direction...
Keywords: AIRCRAFT ACCIDENTS; FRICTION MEASUREMENT; RUNWAY CONDITIONS; TRACTION; BRAKING; AIRCRAFT PERFORMANCE; CONTAMINATION; CORRELATION
|THERMODYNAMIC CHARACTERISTICS OF THE HO2 RADICAL IN AN AQUEOUS SOLUTION - BERDNIKOV, V. M.|
AN EVALUATION OF THE THERMODYNAMIC CHARACTERISTICS OF THE HYDRATION AND DISSOCIATION OF HO2 IS PRESENTED.
Keywords: AIRCRAFT CONFIGURATIONS; CONTROL CONFIGURED VEHICLES; FLIGHT CHARACTERISTICS; AIRCRAFT DESIGN; AIRCRAFT PERFORMANCE; FIGHTER AIRCRAFT; LONGITUDINAL STABILITY
|Disbond Detection in Bonded Aluminum Joints Using Lamb Wave Amplitude and Time-of-Flight - Sun, Keun J.|
In recent years, there was a need of developing efficient nondestructive integrity assessment techniques for large area laminate structures, such as detections of disbond, crack, and corrosion in fuselage of an aircraft. Together with the improving tomography and computer technologies, progress has been made in many fields in NDE towards a faster inspection. Ultrasonically, Lamb wave is considered to be a candidate for large area inspections based on its capability of propagating a relatively lo...
Keywords: ANGLE OF ATTACK; DESIGN ANALYSIS; FIGHTER AIRCRAFT; FLIGHT SIMULATION; PILOT TRAINING; AIRCRAFT PERFORMANCE; CONTROLLABILITY
|Technical accomplishments of the NASA Lewis Research Center, 1989 - NON|
Topics addressed include: high-temperature composite materials; structural mechanics; fatigue life prediction for composite materials; internal computational fluid mechanics; instrumentation and controls; electronics; stirling engines; aeropropulsion and space propulsion programs, including a study of slush hydrogen; space power for use in the space station, in the Mars rover, and other applications; thermal management; plasma and radiation; cryogenic fluid management in space; microgravity phys...
Keywords: AIRCRAFT PERFORMANCE; DECOMPOSITION; DYNAMIC PROGRAMMING; OPTIMIZATION; SENSITIVITY; ALGORITHMS; COMPUTERIZED SIMULATION; INFORMATION FLOW
|Robust intelligent flight control for hypersonic vehicles - Chamitoff, Gregory Erro|
Intelligent optimization methods are applied to the problem of real-time flight control for a class of airbreathing hypersonic vehicles (AHSV). The extreme flight conditions that will be encountered by single-stage-to-orbit vehicles, such as the National Aerospace Plane, present a tremendous challenge to the entire spectrum of aerospace technologies. Flight control for these vehicles is particularly difficult due to the combination of nonlinear dynamics, complex constraints, and parametric uncer...
Keywords: AIRCRAFT DESIGN; COMMERCIAL AIRCRAFT; PASSENGER AIRCRAFT; REMOTELY PILOTED VEHICLES; AERODYNAMICS; AIRCRAFT CONTROL; AIRCRAFT ENGINES; AIRCRAFT PERFORMANCE
|MINERAL COMPOSITION OF THE FUSION CRUST AND ALSO THE METEORITIC AND METEORIC DUST OF THE SIKHOTE-ALIN METEORITE - KOLOMENSKIY, V. D|
A MINERALOGICAL INVESTIGATION FOUND THAT THE MAIN MINERAL OF THE OUTER ZONE OF THE SIKHOTE-ALIN METEORITE FUSION CRUST IS OXYMAGNETITE. THE FUSION CRUST HAS OF AN OUTER ZONE AND AN INNER ZONE. THE OUTER ZONE CONSISTS MAINLY OF OXYMAGNETITE, IOCITE, AND RARE GRAINS OF NICKEL-IRON, AND THE INNER ZONE CONSISTS OF IOCITE AND NICKEL-IRON. THE METEORITIC DUST CONSISTS OF NICKEL-IRON AND OF MAGNETITE. THE METEORIC DUST IS ENCOUNTERED IN THE FORM OF DENSE AND CAVITY-FILLED SPHERES AND OF FILAMENTS; THE ...
Keywords: AERODYNAMIC CONFIGURATIONS; AIRCRAFT DESIGN; PASSENGER AIRCRAFT; TRANSPORT AIRCRAFT; AERODYNAMIC CHARACTERISTICS; AIRCRAFT ENGINES; AIRCRAFT PERFORMANCE; AIRFRAMES
|GRC Payload Hazard Assessment: Supporting the STS-107 Accident Investigation - Schoren, William R.|
A hazard assessment was conducted on the GRC managed payloads in support of a NASA Headquarters Code Q request to examine STS-107 payloads and determine if they were credible contributors to the Columbia accident. This assessment utilized each payload's Final Flight Safety Data Package for hazard identification. An applicability assessment was performed and most of the hazards were eliminated because they dealt with payload operations or crew interactions...
Keywords: COMPUTATIONAL FLUID DYNAMICS; AIRCRAFT DESIGN; DATA BASES; AIRCRAFT PERFORMANCE; WIND TUNNELS
|Coupled RANS/LES for SOFIA Cavity Acoustic Prediction - Woodruff, Stephen L|
A fast but accurate approach is described for the determination of the aero-acoustic properties of a large cavity at subsonic flight speeds. This approach employs a detachededdy simulation model in the free-shear layer at the cavity opening and the surrounding boundary layer, but assumes inviscid flow in the cavity and in the far field. The reduced gridding requirements in the cavity, in particular, lead to dramatic improvements in the time required for the computation...
Keywords: COMMERCIAL AIRCRAFT; AIRCRAFT LANDING; TAKEOFF; AIRCRAFT PERFORMANCE; TRANSPORT AIRCRAFT; LANDING SITES; AIRPORTS; RUNWAYS
|Remote sensing of ocean currents - NON|
The author has identified the following significant results. A time series of the Loop Current in the Gulf of Mexico, covering an annual cycle of growth, spreading, and decay, has been obtained in synchronization with ERTS-1. Computer enhanced images, which are necessary to extract useful oceanic information, show that the current can be observed either by color or sea state effects associated with the cyclonic boundary...
Keywords: AIRCRAFT LANDING; AIRCRAFT PERFORMANCE; COMPUTER PROGRAMS; PERFORMANCE PREDICTION; TAKEOFF; AERODYNAMIC CHARACTERISTICS; AERODYNAMIC FORCES; FLIGHT CONTROL
|NUMERICAL METHODS FOR SOLVING PROBLEMS OF MECHANICS OF CONTINUOUS MEDIA - NON|
NUMERICAL ANALYSIS FOR PROBLEMS OF GAS DYNAMICS
Keywords: AIRCRAFT PERFORMANCE; ARTILLERY; PROJECTILES; PROPELLER DRIVE; AERODYNAMICS; BALLISTICS; HIGH ALTITUDE; HIGH ALTITUDE ENVIRONMENTS
|Nondestructive solid propellant testing - NON|
No Abstract Available
Keywords: AIRCRAFT PERFORMANCE; CONFERENCES; FLIGHT TESTS; X-15 AIRCRAFT; AERODYNAMIC CHARACTERISTICS; AERONAUTICAL ENGINEERING; AIRCRAFT CONFIGURATIONS
|THE SUPERCRITICAL WING - SEIDL, D|
FLOW PHENOMENA ENCOUNTERED IN THE VICINITY OF MACH 1 ARE DISCUSSED. THE APPLICATION OF THE SUPERCRITICAL WING TO THIS FLIGHT REGIME ARE DISCUSSED. RESEARCH WORK AND FLIGHT TESTS PERFORMED BY VARIOUS AMERICAN COMPANIES ARE DETAILED.
Keywords: AIRCRAFT LANDING; AIRCRAFT PERFORMANCE; SHORT TAKEOFF AIRCRAFT; TAKEOFF; CIVIL AVIATION; FLIGHT TESTS; PILOT PERFORMANCE
|DOT/NASA comparative assessment of Brayton engines for guideway vehicle and buses. Volume 1: Summary - NON|
The Department of Transportation requested that the NASA Office of Aeronautics and Space Technology evaluate and assess the potential of several types of gas turbine engines and fuels for the on-board power and propulsion of a future heavy-duty ground transportation system. The purpose of the investigation was threefold: (1) to provide a definition of the potential for turbine engines to minimize pollution, energy consumption, and noise; (2) to provide a useful means of comparison of the types o...
Keywords: AERODYNAMIC CONFIGURATIONS; AIRCRAFT DESIGN; SUPERSONIC SPEED; TECHNOLOGY ASSESSMENT; AIRCRAFT PERFORMANCE; AIRLINE OPERATIONS; COST EFFECTIVENESS; DATA PROCESSING
|Implementation of a Computerized Maintenance Management System - Shen, Yong-Hong|
A primer Computerized Maintenance Management System (CMMS) has been established for NASA Ames pressure component certification program. The CMMS takes full advantage of the latest computer technology and SQL relational database to perform periodic services for vital pressure components. The Ames certification program is briefly described and the aspects of the CMMS implementation are discussed as they are related to the certification objectives.
Keywords: AIRCRAFT PERFORMANCE; DYNAMIC RESPONSE; ENGINE TESTS; FLIGHT TESTS; THRUST; AIRCRAFT ENGINES; THROTTLING; UNSTEADY FLOW
|Handshake in space. A special publication - NON|
The joint Soviet-American space flight operation in July 1975, in which the Soviet Spacecraft Soyuz-19 and the American Apollo rendezvoused in orbit, docked, and carried out various experiments and observations, was three years in preparation, requiring extensive and close interaction by both sides. Among other accomplishments the experiment successfully proved the feasibility of docking two space vehicles of different design while in space, for emergency, scientific, or practical purposes...
Keywords: AIRCRAFT CONTROL; CONTROL THEORY; TRANSPORT AIRCRAFT; AIRCRAFT PERFORMANCE; CIVIL AVIATION; COST EFFECTIVENESS; FUEL CONSUMPTION; TECHNOLOGY ASSESSMENT
|Investigations of the 0.020-scale 88-OTS Integrated Space Shuttle Vehicle Jet-Plume Model in the NASA/Ames Research Center 11 by11-Foot Unitary Plan Wind Tunnel (IA80) - Nichols, M. E|
The results are documented of jet plume effects wind tunnel test of the 0.020-scale 88-OTS launch configuration space shuttle vehicle model in the 11 x 11 foot leg of the NASA/Ames Research Center Unitary Plan Wind Tunnel. This test involved cold gas main propulsion system (MPS) and solid rocket motor (SRB) plume simulations at Mach numbers from 0.6 to 1.4. Integrated vehicle surface pressure distributions, elevon and rudder hinge moments, and wing and vertical tail root bending and torsional mo...
Keywords: AIRCRAFT CONTROL; CONTROL THEORY; AIRCRAFT PERFORMANCE; DIGITAL TECHNIQUES; FLY BY WIRE CONTROL; LOW COST; SYSTEMS ENGINEERING
|Skylab experiments. Volume 7: Living and working in space - NON|
Experiments conducted on the Skylab vehicle that will measure and evaluate the ability of the crew to live and work effectively in space are discussed. The methods and techniques of human engineering as they relate to the design and evaluation of work spaces, requirements, and tools are described. The application of these methods and the Skylab measurements to the design of future spacecraft are analyzed.
Keywords: AIRCRAFT LANDING; AIRCRAFT PERFORMANCE; DO-31 AIRCRAFT; LOADS (FORCES); AERODYNAMIC CHARACTERISTICS; DATA ACQUISITION; FLIGHT TESTS
|Chemical analysis of tungsten-uranium dioxide materials - Dupraw, W. A.|
No Abstract Available
Keywords: AERODYNAMIC CONFIGURATIONS; FIGHTER AIRCRAFT; WIND TUNNEL STABILITY TESTS; AERODYNAMIC CHARACTERISTICS; AIRCRAFT PERFORMANCE; AIRCRAFT STABILITY; SUPERSONIC SPEED
|Position sensing device employing misaligned magnetic field generating and detecting apparatus Patent - Strange, M. G|
Magnetic element position sensing device, using misaligned electromagnets
Keywords: COCKPIT SIMULATORS; FLIGHT SIMULATION; HUMAN FACTORS ENGINEERING; PILOT PERFORMANCE; AIRCRAFT CONTROL; AIRCRAFT PERFORMANCE; CONFERENCES; MAN MACHINE SYSTEMS